A control method of a range hood having a purification function

Abstract

The application discloses a control method of a range hood with a purification function. When the range hood is turned off and enters a cruise mode, an air quality detection module is started and detects air quality. When the air quality detection module detects that the concentration C of pollutants in the air is greater than or equal to C1, a wind curtain module, a rotating module and a negative ion module are started. The wind curtain module operates at a power P1. The rotating module swings the wind curtain module to blow air in a vertical direction and a direction away from a user side, or swings the wind curtain module to blow air in a vertical direction and a direction towards the user side. When the air quality detection module detects that the concentration C of pollutants in the air is less than C1 and is maintained for a time T1, the wind curtain module, the rotating module and the negative ion module are turned off. Compared with the prior art, the control method of the range hood with the purification function can purify air in a kitchen when the air quality in the kitchen is substandard, and can avoid a user from entering the kitchen with substandard air quality and inhaling harmful gas.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range hood, in particular, to a control method of range hood with purification function. BACKGROUND

[0002] The range hood is an air extraction device in the kitchen. The range hood is provided with an exhaust fan in the air collecting cavity. The range hood is provided with an air inlet communicating with the air collecting cavity. When the range hood is started, the exhaust fan operates, and the exhaust fan forms a negative pressure in the air collecting cavity. The air inlet also forms a negative pressure. Under the action of the negative pressure, the oil fume generated by the user during cooking enters the air collecting cavity through the air inlet and is then discharged. The air outlet of the air collecting cavity of the range hood communicates with the external flue. When the flue gas flows backward, the oil fume in the flue will enter the air collecting cavity, and then the air inlet of the range hood will flow back into the kitchen, causing the concentration of pollutants in the kitchen to exceed the standard. When the user enters the kitchen, the user will inhale the air with the concentration of pollutants exceeding the standard. When the air with the concentration of pollutants exceeding the standard flows in the kitchen, it will also enter the living room and dining room, affecting the environmental air quality of the living room and dining room. SUMMARY

[0003] The present application relates to the technical field of range hood, in particular, to a control method of range hood with purification function.

[0004] A control method of range hood with purification function, the range hood comprising a main control module, an exhaust fan, an air curtain module, a rotating module, a negative ion module and an air quality detection module, the exhaust fan, the air curtain module, the rotating module, the negative ion module and the air quality detection module being connected to the main control module, the rotating module being used for adjusting the air outlet direction of the air curtain module, the air outlet direction of the air curtain module determining the flow direction of the negative ions generated by the negative ion module, the control method of the range hood comprising: the range hood having a cruise mode, when the range hood is turned off and enters the cruise mode, the air quality detection module is started and detects the air quality, when the air quality detection module detects that the concentration C of pollutants in the air is greater than or equal to C1, the air curtain module, the rotating module and the negative ion module are started, the air curtain module operates at a power P1, the rotating module swings the air curtain module to blow air in the vertical direction and away from the user side, or swings the air curtain module to blow air in the vertical direction and towards the user side, until the air quality detection module detects that the concentration C of pollutants in the air is less than C1 and maintains for a time T1, the air curtain module, the rotating module and the negative ion module are turned off.

[0005] According to an embodiment of the present application, the range hood further comprises a timing module, when the range hood is powered off and enters the cruise mode, the timing module starts timing, when the air quality detection module detects the pollutant concentration C≥C1 in the air for the first time, if the timing module timing duration T

[0006] According to an embodiment of the present application, after the range hood enters the cruise mode, when the air quality detection module detects the pollutant concentration C≥C1 in the air for the first time, the timing module is closed, the air curtain module, the rotating module and the negative ion module are started, and the air curtain module swings in the vertical direction and towards the user side.

[0007] According to an embodiment of the present application, in the cruise mode, when the air quality detection module detects the pollutant concentration C≥C1 in the air, the air curtain module, the rotating module and the negative ion module are started, after time T3, if the air quality detection module still detects the pollutant concentration C≥C1 in the air, the air curtain module, the rotating module, the negative ion module and the timing module are closed, the range hood is operated and the kitchen is ventilated, until the pollutant concentration C

[0008] According to an embodiment of the present application, in the cruise mode, the user can set the time T4, so that the air quality detection module detects the pollutant concentration in the air every interval T4, when the pollutant concentration C

[0009] According to an embodiment of the present application, the range hood further comprises a human body sensing module, when the rotating module swings the air curtain module in the vertical direction and away from the user side, the human body sensing module is started, and detects the horizontal distance L between the human body and the negative ion module, when L≤L1, the speed of the negative ion module releasing negative ions is reduced from V1 to V2, V2

[0010] According to one embodiment of the present invention, when the rotating module causes the air curtain module to swing in the vertical direction and in the direction away from the user side to supply air, the angle between the air supply direction of the air curtain module and the vertical plane is 0° to 75°; when the rotating module causes the air curtain module to swing in the vertical direction and in the direction toward the user side to supply air, the angle between the air supply direction of the air curtain module and the vertical plane is 0° to 75°.

[0011] According to one embodiment of the present invention, the range hood also has a range fume extraction mode and a shutdown mode, and the control method of the range hood is: in the range fume extraction mode, the smoke exhaust fan runs, the air curtain module runs at power P2, the main control module adjusts the power of the smoke exhaust fan according to the pollutant content value in the air detected by the air quality detection module, and the rotation module and the negative ion module do not run; in the shutdown mode, the smoke exhaust fan, the air curtain module, the rotation module, the negative ion module and the air quality detection module are all in the off state; the main control module controls the range hood to enter the shutdown mode or the cruise mode from the range fume extraction mode, where P1>P2.

[0012] According to one embodiment of the present invention, the range hood also has a control panel, which has a power button and a cruise button. The control method of the range hood is as follows: when cooking, start the power button and the range hood enters the range hood extraction mode. After cooking is completed, start the power button again and the range hood enters the shutdown mode. Start the cruise button during the cooking process. After cooking is completed, start the power button and the range hood enters the cruise mode until the power button is started and the range hood is turned on next time. When the range hood is in the shutdown mode, start the cruise button and the range hood enters the cruise mode until the power button is started and the range hood is turned on next time.

[0013] According to one embodiment of the present invention, in the range fume extraction mode, the air curtain module supplies air vertically downward.

[0014] Compared with the prior art, the control method of the range hood with purification function of the present invention has the following advantages:

[0015] 1. When the control method of the range hood with a purification function of the present invention is applied to the range hood, the air quality of the kitchen space can be detected and monitored by the air quality detection module when the range hood is turned off. When the kitchen air quality does not meet the standard, the kitchen air is purified, which can prevent users from entering the kitchen with substandard air quality and inhaling harmful gases. It can also prevent the substandard air in the kitchen from flowing into the dining room and living room and affecting the health of users in the dining room and living room.

[0016] 2. The control method of the range hood with purification function of the present invention is as follows: when the negative ion module is started and purifies the air, the rotating module causes the air curtain module to swing to supply air, so that the air outlet of the air curtain module can deliver negative ions to a larger range, thereby improving the purification effect and purification efficiency of the negative ion module.

[0017] 3. The control method of the smoke machine with purification function, when the rotation module makes the air curtain module swing in the vertical direction and the direction away from the user side, the negative ions generated by the negative ion module can diffuse towards the wall fixed with the smoke machine or the backboard of the smoke machine and the cooktop, and the negative ions can purify the oil stains on the wall fixed with the smoke machine or the backboard of the smoke machine and the oil stains on the cooktop in the process of flowing of the oil fume; when the rotation module makes the air curtain module swing in the vertical direction and the direction towards the user side, the negative ions generated by the negative ion module diffuse in the direction far away from the smoke machine under the influence of the air outlet of the air curtain module and purify the air in the kitchen space. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The control system diagram of the smoke machine adopting the control method of the smoke machine with purification function of the present application;

[0019] Figure 2 The control flow chart of the control method of the smoke machine with purification function of the present application;

[0020] Figure 3 The running state diagram of the smoke machine adopting the control method of the smoke machine with purification function of the present application when the smoke machine enters the oil fume extraction mode;

[0021] Figure 4 The running state diagram of the smoke machine adopting the control method of the smoke machine with purification function of the present application when the smoke machine enters the shutdown mode;

[0022] Figure 5 The running state diagram of the smoke machine adopting the control method of the smoke machine with purification function of the present application when the smoke machine enters the cruise mode in the first embodiment;

[0023] Figure 6 The running state diagram of the smoke machine adopting the control method of the smoke machine with purification function of the present application when the smoke machine enters the cruise mode in the first embodiment;

[0024] Figure 7 The running state diagram of the smoke machine adopting the control method of the smoke machine with purification function of the present application when the smoke machine enters the cruise mode in the first embodiment;

[0025] Figure 8 The running state diagram of the smoke machine adopting the control method of the smoke machine with purification function of the present application when the smoke machine enters the cruise mode in the first embodiment;

[0026] The function implementation and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described herein below with reference to a few drawings. Details inherent in the art will become apparent to the skilled artisan in the art once the general nature of the application is understood from the following description. The application is not limited to particular embodiments described herein because such embodiments will vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, since the scope of the present application will be limited only by the appended claims.

[0028] It should be noted that all directional directions (such as up, down, left, right, front, back, etc.) described herein are only used to explain relative positional relationships, movement conditions, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional directions will also change accordingly.

[0029] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and are not particularly intended to indicate the order or sequence, nor to limit the present application. They are merely used to distinguish components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0030] In order to further understand the content, characteristics and effects of the present application, the following embodiments are exemplified and described in detail below with reference to the accompanying drawings:

[0031] Please refer to Figure 1 and Figure 2The application discloses a control method of a range hood with a purification function, and the control method comprises the following steps: when the range hood is applied to the range hood, the range hood comprises a main control module, an exhaust fan, an air curtain module, a rotating module, a negative ion module and an air quality detection module, the exhaust fan, the air curtain module, the rotating module, the negative ion module and the air quality detection module are connected with the main control module, the rotating module is used for adjusting the air outlet direction of the air curtain module, the air outlet direction of the air curtain module determines the flow direction of the negative ions generated by the negative ion module, and the control method of the range hood is as follows: the range hood has a cruise mode, when the range hood is turned off and enters the cruise mode, the air quality detection module is started and detects the air quality, when the air quality detection module detects that the concentration C of the pollutants in the air is greater than or equal to C1, the air curtain module, the rotating module and the negative ion module are started, the air curtain module operates at a power P1, the rotating module makes the air curtain module swing and blow air in the vertical direction and the direction away from the user side, or makes the air curtain module swing and blow air in the vertical direction and the direction towards the user side, and when the air quality detection module detects that the concentration C of the pollutants in the air is less than C1 and is maintained for a time T1, the air curtain module, the rotating module and the negative ion module are turned off.

[0032] The control method of the range hood with the purification function can detect and monitor the air quality of the kitchen space through the air quality detection module when the range hood is turned off, can purify the air in the kitchen when the air quality in the kitchen is substandard, can avoid that the user enters the kitchen with the substandard air quality and inhales the harmful gas, and can also avoid that the air with the substandard quality in the kitchen flows to the dining room and the living room and affects the health of the users who are active in the dining room and the living room.

[0033] The control method of the smoke machine with the purification function of the application can make the air curtain module swing to blow air when the negative ion module is started and purifies air, can make the air outlet of the air curtain module send negative ions to a larger range, and can improve the purification effect and efficiency of the negative ion module.

[0034] The control method of the smoke machine with the purification function of the application can make the air curtain module swing to blow air when the negative ion module is started and purifies air, can make the air outlet of the air curtain module send negative ions to a larger range, and can improve the purification effect and efficiency of the negative ion module.

[0035] The air quality detection module can adopt a smoke sensor, and when the smoke sensor is adopted, the smoke sensor detects the smoke concentration in the air; the air quality detection module can also adopt a PM2.5 detection module, and when the PM2.5 detection module is adopted, the PM2.5 detection module detects the negative ion content in the air.

[0036] The control method of the smoke machine with the purification function has the time counting module, when the smoke machine is powered off and enters the homing mode, the time counting module starts to count, when the air quality detection module first detects that the pollutant concentration C in the air is greater than or equal to C1, if the time counting module counts the time T less than T2, the air curtain module, the rotating module and the negative ion module are started, the rotating module makes the air curtain module swing in the vertical direction and the direction away from the user side; if the time counting module counts the time T greater than or equal to T2, the air curtain module, the rotating module and the negative ion module are started, the rotating module makes the air curtain module swing in the vertical direction and the direction towards the user side. Through the time counting of the instant module, the time from the time point when the air quality detection module first detects that the air quality is substandard after the smoke machine is powered off can be judged, that is, the time counting module can judge the time from the time point when the air quality detection module first detects that the air quality is substandard to the time when the user completes the cooking operation. When the time from the time point when the air quality detection module first detects that the air quality is substandard to the time when the user completes the cooking operation is relatively short, the source of the polluted air at this time is mainly the oil stains on the wall fixed with the smoke machine or the back plate of the smoke machine or the oil stains on the countertop. When the air curtain module, the rotating module and the negative ion module are started, the rotating module makes the air curtain module swing in the vertical direction and the direction away from the user side, so that the negative ions generated by the negative ion module diffuse towards the wall fixed with the smoke machine or the back plate of the smoke machine and the countertop, and the negative ions purify the oil stains adhered to the wall fixed with the smoke machine or the back plate of the smoke machine or the oil stains on the countertop during the flow of the oil fume. When the time from the time point when the air quality detection module first detects that the air quality is substandard to the time when the user completes the cooking operation is relatively long, the air detected by the air quality detection module is the air diffused in the kitchen space. When the air curtain module, the rotating module and the negative ion module are started, the rotating module makes the air curtain module swing in the vertical direction and the direction towards the user side, and the negative ions generated by the negative ion module diffuse towards the kitchen space and purify the air in the kitchen space under the influence of the air outlet of the air curtain module.

[0037] T2 is the time length set in the main control module, which is obtained according to multiple tests. The test results are based on the fact that, after cooking is completed, under the condition that the smoke exhaust fan of the smoke machine is closed, the pollutant concentration in the air in the space below the smoke machine and opposite to the countertop and the pollutant concentration in the space outside the cooktop change with time. The critical point is the time length when the pollutant concentration in the air in the space below the smoke machine and opposite to the countertop starts to be less than the pollutant concentration in the space outside the cooktop. The time T2 is obtained by averaging the time length of multiple tests.

[0038] The control method of the smoke machine with the purification function of the application, after the smoke machine enters the cruise mode, when the air quality detection module detects for the first time that the concentration C of pollutants in the air is greater than or equal to C1, the timing module is closed, the air curtain module, the rotating module and the negative ion module are started, and the air curtain module swings to blow air in the vertical direction and the direction towards the user side. After the user completes the cooking operation and turns off the machine, the main control module completes a purification operation according to the detection result of the air quality detection module, and when the subsequent air quality detection module detects that the air quality is substandard again, the main control module starts the air curtain module, the rotating module and the negative ion module, and the rotating module makes the air curtain module swing to blow air in the vertical direction and the direction towards the user side, and the negative ions generated by the negative ion module diffuse to the kitchen space under the influence of the air outlet of the air curtain module and purify the air in the kitchen space.

[0039] The control method of the smoke machine with the purification function of the application, in the cruise mode, when the air quality detection module detects that the concentration C of pollutants in the air is greater than or equal to C1, the air curtain module, the rotating module and the negative ion module are started, and after a time T3, if the air quality detection module still detects that the concentration C of pollutants in the air is greater than or equal to C1, the air curtain module, the rotating module, the negative ion module and the timing module are closed, the exhaust fan is started and ventilates the kitchen, and until the concentration C of pollutants in the air is less than C1 and maintains for a time T1, the exhaust fan is closed. After the purification process is performed for a time T3, if the concentration of pollutants in the air cannot be reduced all the time, it indicates that the air pollution in the space is serious at this time or there is a backflow of oil fume, and the negative ion module alone cannot purify the air in time, at this time the main control module closes the air curtain module, the rotating module and the negative ion module, and starts the exhaust fan to ventilate the space to purify the air in the space, and when the air quality detection module detects that the concentration C of pollutants in the air is less than C2 and maintains for a time T1 during the operation of the exhaust fan, the smoke machine completes the purification operation and the exhaust fan is closed.

[0040] In the purification process, if the exhaust fan is started, the negative ions generated by the negative ion module will be sucked into the smoke collection cavity of the smoke machine, which is not helpful for purifying the air in the space, so the negative ion module is closed when the exhaust fan ventilates the kitchen. In addition, when the exhaust fan ventilates the space, the air in the entire kitchen is air with excessive concentration of pollutants, so the air curtain module does not need to be started, and therefore the air curtain module is also closed when the exhaust fan ventilates the space.

[0041] The control method of the range hood with the purification function of the application, in the cruise mode, the user can set the time length T4, so that the air quality detection module detects the pollutant content in the air every interval time T4, when the pollutant content value C in the air is less than C1, the air quality detection module is closed and started after waiting for the next time period T4. Between two meals and at night, the user does not appear frequently in the kitchen, and the real-time detection of the air quality by the air quality detection module is too wasteful, so that the interval time T4 is set, so that the air quality detection module detects the air quality every interval time T4, which can monitor the air condition of the kitchen environment and does not cause energy waste. And the range hood starts the cruise mode, mainly to make the air quality in the kitchen meet the standard when the user is in the kitchen space, between breakfast and lunch and between lunch and dinner, the user has the probability of appearing in the kitchen, and when the air in the kitchen flows to the dining room and the living room, it also affects the user in the dining room or the living room, so that the air quality detection module detects the air quality every interval time T4 in the time period between two meals, so as to avoid that when the air in the kitchen is polluted, the polluted air flows to the living room and the dining room, affecting the health of the user in the living room and the dining room. After 12 o'clock at night after dinner, the probability of the user appearing in the kitchen, the living room and the dining room is small, at this time, the cruise mode can be closed or the detection time T4 can be prolonged, to avoid the energy consumption caused by the continuous operation of the air quality detection module.

[0042] The control method of the range hood with the purification function of the application, the range hood further comprises a human body sensing module, when the rotating module makes the air curtain module swing in the vertical direction and the direction away from the user side, the human body sensing module starts and detects the horizontal distance L between the human body and the negative ion module, when L≤L1, the speed of the negative ion module releasing negative ions is reduced from V1 to V2, V2

[0043] When the negative ion module generates negative ions to purify the air, the negative ions released by the module are negatively charged. When the airflow from the air curtain module blows out the negative ions and brings them into direct contact with the human body, the user experiences an electric shock. To prevent the air curtain containing negative ions from blowing directly toward the human body, the range hood is equipped with a human body sensing module, which is used to detect the horizontal distance between the human body and the negative ion module. When the human body sensing module detects that the user is within a safe range or that there is no user activity within the detection range, the negative ion module releases negative ions at a rate of V1. The operating power of the air curtain module is P1. At this power, the air supply distance of the air curtain module is H. When the angle between the air supply direction of the air curtain module and the vertical plane is α, the horizontal distance between the end of the air curtain formed by the air curtain module and the negative ion module is L1 = Hsinα. When the horizontal distance between the user and the negative ion module satisfies L>Hsinα, the air curtain output by the air curtain module will not blow toward the user. The user's safe distance is related to the air supply distance and air outlet direction of the air curtain module. The greater the air supply distance of the air curtain module and the greater the air outlet direction of the air curtain module within 0° to 90°, the greater the horizontal distance the user needs to be from the negative ion module.

[0044] See also Figure 5 ,exist Figure 5 In the embodiment shown, when the human body sensing module detects a human body, the negative ion concentration in the air supplied by the air curtain module can be reduced by reducing the speed at which the negative ion module generates negative ions, thereby reducing the electric shock sensation when the human body contacts the air curtain.

[0045] See also Figure 6 ,exist Figure 6 In the illustrated embodiment, when the human body sensing module detects a human body, the rotation module adjusts the air supply direction of the air curtain module to an angle α with the vertical plane, satisfying the following conditions: 0 ≤ sin α < L1 / H. L1 = Hsin α. When 0 ≤ sin α < L1 / H, L1 > Hsin α, indicating that the user is within a safe range.

[0046] See also Figure 7 ,exist Figure 7 In the embodiment shown, when the human body sensing module detects a human body, the main control mode reduces the power of the air curtain module, and the air supply distance of the air curtain module becomes smaller, L1=Hsinα. The main control module reduces the operating power of the air curtain module so that the air blown out by the air curtain module cannot directly contact the human body.

[0047] See also Figure 8The control method of the smoke machine with the purification function of the application, when the human body sensing module detects the human body, L<=L1, the speed of the anion module releasing the negative ions is reduced from V1 to V2, V2

[0048] The control method of the smoke machine with the purification function of the application, when the human body sensing module detects the human body, L<=L1, the speed of the anion module releasing the negative ions is reduced from V1 to V2, V2 The smoke machine with the purification function of the application, the top plate or the machine head of the smoke machine is provided with the air curtain air outlet, the air outlet direction of the air curtain air outlet is arranged downward, the air curtain module is arranged in the main body of the smoke machine, the air blown by the air curtain module is blown out through the air curtain air outlet, when the rotating module rotates the air curtain module, the air outlet direction of the air curtain module changes, if the angle between the air outlet direction of the air curtain module and the vertical plane is too large, part of the air outlet of the air curtain module is blocked by the wall where the air curtain air outlet is arranged, part of the air of the air curtain enters the upper part of the wall, which affects the air outlet amount of the air curtain module, therefore, when the rotating module swings the air blown by the air curtain module, the angle between the air outlet direction of the air curtain module and the vertical plane is controlled to be 0-75 degrees, in this way, the air blown by the air curtain module can be blown to different directions, and the air outlet amount of the air curtain module can be ensured.

[0049] Please refer to Figures 2 to 4 The control method of the smoke machine with the purification function of the application, the smoke machine also has the oil fume extraction mode and the shutdown mode, the control method of the smoke machine is that: in the oil fume extraction mode, the smoke exhaust fan operates, the air curtain module operates at the power P2, the main control module adjusts the power of the smoke exhaust fan according to the pollutant content value detected by the air quality detection module, the rotating module and the anion module do not operate; in the shutdown mode, the smoke exhaust fan, the air curtain module, the rotating module, the anion module and the air quality detection module are all in the closed state; the main control module controls the smoke machine to enter the shutdown mode or the cruise mode from the oil fume extraction mode, wherein P1>P2. The smoke machine adopting the control method of the application, when the smoke machine enters the oil fume extraction mode, the smoke exhaust fan starts, a negative pressure is formed at the air inlet of the smoke machine under the action of the negative pressure, the gas in the use environment flows to the air inlet and enters the air collecting cavity of the smoke machine from the air inlet, and then is discharged by the smoke exhaust fan, when the smoke exhaust fan operates, the air curtain module starts, the air curtain module blows air downward and forms the air curtain, the air curtain is located between the user and the cooking stove, can block the oil fume generated in the cooking, reduce the oil fume escaping to the user side, and reduce the oil fume inhaled by the user; after the cooking is completed, the smoke exhaust fan is turned off, and the air curtain module is turned off.

[0050] When the user starts the machine, the exhaust fan will run at the default power, and the user can select the damper on the control panel to make the exhaust fan have corresponding running power. However, after the user selects the damper, if the generation amount and speed of the oil fume match the damper selected by the user during the cooking process, and the air quality detected by the air quality detection module meets the standard, the exhaust fan will continue to run at the current power. When the generation speed and amount of the oil fume do not match the current damper during the cooking process, the exhaust fan cannot timely exhaust the oil fume generated during cooking, and the oil fume will break through the barrier of the air curtain and escape to the user side. At this time, the concentration of pollutants in the air detected by the air quality detection module will increase. When the concentration of pollutants in the air reaches the set value, the main control module will increase the power of the exhaust fan to increase the suction degree of the exhaust fan. When the power of the exhaust fan is increased, the exhaust capacity of the exhaust fan is improved. If the amount of oil fume escaping outside through the barrier of the air curtain is reduced at this time, the concentration of pollutants in the air detected by the air quality detection module is reduced, and when the concentration of pollutants in the air is reduced and meets the standard and maintains for a time T2, the main control module will make the exhaust fan run at the power after the increase. However, after the main control module increases the power of the exhaust fan by one step for a period of time, the air quality detection module still detects that the concentration of pollutants in the air does not meet the standard, and the main control module will continue to increase the power of the exhaust fan until the exhaust fan can reduce the concentration of pollutants in the air to meet the standard and maintain for a time T2. If the main control module increases the power of the exhaust fan to the maximum and runs for a period of time, and the air quality detection module still detects that the concentration of pollutants in the air does not meet the standard, the main control module will issue a fault warning.

[0051] The control method of the smoke machine with the purification function of the application, the air curtain wind is smaller in the position far from the air outlet of the air curtain assembly in the process of flowing downward, because if the power of the air curtain module is too large during cooking, the height of the lowest end of the air curtain formed by the air discharged by the air curtain module may extend to the surface of the stove or below the surface of the stove, and the air curtain will affect the airflow flowing towards the burner of the stove, affecting the combustion efficiency of the burner, so in the normal cooking process, the ideal state is that the lowest end of the air curtain formed by the air curtain module is higher than the burner of the stove, so that the air curtain formed by the air curtain module can effectively block the cooking generated oil fume from escaping to the user side, and can also avoid the air curtain wind affecting the airflow flowing to the burner; and when the negative ion module is running, the ideal state is that the air curtain wind can quickly blow out the negative ions generated by the negative ion module and blow them to a relatively far place, so that the negative ions generated by the negative ion module can fully purify the air of the use space. Therefore, the control method of the smoke machine with the purification function of the application makes the air curtain module have different powers, when the smoke exhaust fan is running and sucking oil fume, the air curtain module runs at power P2, under this power, the air curtain module can form an air curtain between the user and the stove, block the oil fume from escaping to the user side, reduce the amount of oil fume inhaled by the user, and under the secondary power, the air curtain wind will not affect the airflow flowing to the burner of the stove; after the smoke exhaust fan is turned off, when the negative ion module is running, the air curtain module runs at power P1 greater than P2, the air curtain wind generated by the air curtain module has a relatively large wind speed, can quickly blow out the negative ions generated by the negative ion module, and the blowing distance is relatively far, so that the negative ions generated by the negative ion module can fully purify the air of the use space, in addition, when the negative ion module is running, the rotating module runs and adjusts the air outlet direction of the air curtain module, which can transport the negative ions generated by the negative ion module to different directions, so that the negative ions generated by the negative ion module can fully purify the air of the use space, and improve the purification speed.

[0052] After the user completes cooking, the range hood can be actively controlled by the user to switch from the range hood extraction mode to the off mode or cruise mode. When actively controlled by the user, the range hood also has a control panel with a power button and a cruise button. The control method of the range hood is as follows: when cooking, the power button is activated to enter the range hood extraction mode. After cooking is completed, the power button is activated again to enter the off mode. During the cooking process, the cruise button is activated. After cooking is completed, the power button is activated to enter the cruise mode until the next time the power button is activated and the range hood is turned on. When the range hood is in the off mode, the cruise button is activated to enter the cruise mode until the next time the power button is activated and the range hood is turned on. That is, when the range hood is in the range hood extraction mode, if the user activates the cruise mode through the control panel at this time, then after the user completes cooking, the user clicks the power button, the range hood will enter the cruise mode. If the user does not make any other selections when the range hood is in the range hood extraction mode, the range hood will directly enter the off mode when the user clicks the power button after cooking is completed.

[0053] When the range hood is in cruise mode, if the user clicks the cruise button, the range hood will end the cruise mode in advance and enter the shutdown mode. If the user clicks the power button, the range hood will end the cruise mode in advance and enter the range hood mode.

[0054] The control method of the range hood with a purification function of the present invention is as follows: in the range fume extraction mode, the air curtain module supplies air vertically downward. The air supply distance of the air curtain module when operating at power P2 is fixed. For ease of explanation, the air supply distance when the air curtain module is operating at power P2 is defined as L2, the air supply height is defined as H2, and the angle between the air outlet direction and the vertical direction is defined as θ. The following relationship exists between the air supply distance 2L and the air supply height H2: H2=L2cosθ. It is easy to know that the smaller the angle θ is, the greater the air supply height is. Therefore, when the range hood is in the range fume extraction mode, the air curtain assembly supplies air vertically downward. At this time, the angle θ between the air outlet direction of the air curtain module and the vertical direction is 0, and the air supply height H2 is equal to the air supply distance H2. When the air curtain module is operated at a smaller power P2, the air curtain wind can be delivered to the set distance.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A control method for a range hood with a purification function, characterized in that: The range hood includes a main control module, a smoke exhaust fan, an air curtain module, a rotation module, a negative ion module, an air quality detection module and a timing module. The smoke exhaust fan, air curtain module, rotation module, negative ion module and air quality detection module are connected to the main control module. The rotation module is used to adjust the air outlet direction of the air curtain module. The air outlet direction of the air curtain module determines the flow direction of the negative ions generated by the negative ion module. The control method of the range hood is that: the range hood has a cruise mode. When the range hood is turned off and enters the cruise mode, the timing module starts timing, the air quality detection module starts and detects the air quality. When the air quality detection module detects the pollutant concentration C≥C1 in the air for the first time, if the timing module timing time T<T2, the air curtain module, rotation module and negative ion module are started, the air curtain module runs at power P1, and the rotation module makes the air curtain module The block swings in the vertical direction and away from the user side to supply air; if the timing module counts for a duration T≥T2, the air curtain module, the rotation module and the negative ion module are started, and the rotation module causes the air curtain module to swing in the vertical direction and toward the user side to supply air until the air quality detection module detects that the concentration of pollutants in the air is C<C1 and maintains for a duration T1, and then the air curtain module, the rotation module and the negative ion module are turned off, wherein T2 is the duration set in the main control module, which is obtained based on multiple experiments. After cooking is completed, when the exhaust fan of the range hood is turned off, the concentration of pollutants in the air in the space below the range hood and facing the stove counter and the concentration of pollutants in the space outside the stove change. The critical point is the duration when the concentration of pollutants in the air in the space below the range hood and facing the stove counter begins to be less than the concentration of pollutants in the space outside the stove. The time T2 is obtained by averaging the duration of multiple experiments.

2. The control method of the range hood with purification function according to claim 1, characterized in that: After the range hood enters the cruise mode, when the air quality detection module detects the pollutant concentration C≥C1 in the air not for the first time, the timing module is turned off, the air curtain module, the rotation module and the negative ion module are started, and the air curtain module swings in the vertical direction and toward the user side to supply air.

3. The control method of the range hood with purification function according to claim 1, characterized in that: In cruise mode, when the air quality detection module detects that the pollutant concentration in the air is C≥C1, the air curtain module, rotation module and negative ion module are started. After time T3, if the air quality detection module still detects that the pollutant content value in the air is C≥C1, the air curtain module, rotation module, negative ion module and timing module are turned off, and the smoke exhaust fan runs and ventilates the kitchen until the pollutant content value in the air is C<C1 and is maintained for T1, and then the smoke exhaust fan is turned off.

4. The control method of the range hood with purification function according to claim 1, characterized in that: In cruise mode, the user can set the duration T4 so that the air quality detection module detects the pollutant content in the air once every interval T4. When the pollutant content value C in the air is less than C1, the air quality detection module is turned off and waits for the next time period T4 to start.

5. The control method of the range hood with purification function according to claim 1, characterized in that: The range hood also includes a human body sensing module. When the rotation module causes the air curtain module to swing in the vertical direction and away from the user side to supply air, the human body sensing module is started and detects the horizontal distance L between the human body and the negative ion module. When L≤L1, the speed at which the negative ion module releases negative ions is reduced from V1 to V2, V2<V1, and L1 is the horizontal distance between the end of the air curtain formed by the air curtain module and the negative ion module; or / and the rotation module causes the angle α between the air supply direction of the air curtain module and the vertical plane to satisfy: 0≤sinα<L1 / H, where H is the air supply distance of the air curtain module; or / and the power of the air curtain module is reduced from P1 to P3, and P3<P1.

6. The control method of the range hood with purification function according to claim 1, characterized in that: When the rotation module causes the air curtain module to swing in the vertical direction and in the direction away from the user side to supply air, the angle between the air supply direction of the air curtain module and the vertical plane is 0° to 75°; when the rotation module causes the air curtain module to swing in the vertical direction and in the direction toward the user side to supply air, the angle between the air supply direction of the air curtain module and the vertical plane is 0° to 75°.

7. The control method of the range hood with purification function according to claim 1, characterized in that: The range hood also has a range fume extraction mode and a shutdown mode. The control method of the range hood is: in the range fume extraction mode, the smoke exhaust fan runs, the air curtain module runs at power P2, the main control module adjusts the power of the smoke exhaust fan according to the pollutant content value in the air detected by the air quality detection module, and the rotation module and the negative ion module do not run; in the shutdown mode, the smoke exhaust fan, air curtain module, rotation module, negative ion module and air quality detection module are all in the off state; the main control module controls the range hood to enter the shutdown mode or cruise mode from the range fume extraction mode, where P1>P2.

8. The control method of the range hood with purification function according to claim 7, characterized in that: The range hood also has a control panel, which has a power button and a cruise button. The control method of the range hood is as follows: when cooking, activate the power button, the range hood enters the range hood extraction mode, and after cooking, activate the power button again, the range hood enters the shutdown mode; during the cooking process, activate the cruise button, and after cooking, activate the power button, the range hood enters the cruise mode until the power button is activated and the range hood is turned on next time; when the range hood is in the shutdown mode, activate the cruise button, the range hood enters the cruise mode until the power button is activated and the range hood is turned on next time.

9. The control method of the range hood with purification function according to claim 7, characterized in that: In the range fumes extraction mode, the air curtain module supplies air vertically downward.

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